<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/fmt" prefix="fmt" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/functions" prefix="fn" %>
<%@page language="java" contentType="text/html; charset=utf-8"
        pageEncoding="utf-8" %>
<c:set var="ctx" value="${pageContext.request.contextPath}"/>
<script type="text/javascript">
    //设置cookie
    function setCookie(c_name, value, expiredays) {
        var exdate = new Date()
        exdate.setDate(exdate.getDate() + expiredays)
        document.cookie = c_name + "=" + escape(value) + ((expiredays == null) ? "" : ";expires=" + exdate.toGMTString())
    }

    //取回cookie
    function getCookie(c_name) {
        if (document.cookie.length > 0) {
            c_start = document.cookie.indexOf(c_name + "=")
            if (c_start != -1) {
                c_start = c_start + c_name.length + 1
                c_end = document.cookie.indexOf(";", c_start)
                if (c_end == -1) {
                    c_end = document.cookie.length
                }
                return unescape(document.cookie.substring(c_start, c_end))
            }
        }
        return ""
    }
</script>